Driving ivlechanisivi for sewing-machines



(No Model.)

-P.. L. HARTENSTEINI Driving M- No. 232,491.

eohanism for Sewing Machines.

Patented Sept. 21,1880.

m a w 1 N- PEIERS, PNOTO-IJTMOGRAFNEE wAsmNGT Nara STATES ATENT OFFICE.

FRANZ L. IIARTENSTEIN, OF NASHVILLE, TENNESSEE.

DRIVING MECHANISM FOR SEWING-MACHINES.

sPncIrIc'A'rIoN forming part of Letters Patent No. 232,491, dated September 21, 1880.

Application filed August 23, 1880.

To all whom it may concern:

Be it known that I, FRANZ LUDWIG HART- ENSTEIN, of Nashville, in the county of Davidson and State of Tennessee, have invented new and useful Improvements in Driving Mechanism for Sewing-Machines, of which the following is a specification.

The invention relates to means whereby the slow reciprocating motion of a pair of treadles is converted into the rapid rotary motion required for the fly-wheel of a sewing-machine.

The device consists of a pair of treadles pivoted and supported by levers fulcrumed on a shaft journaled in the lower part of the frame of the sewing-machine, the treadles having pawls engaging in circular ratchets on the shaft, and springs for elevating them after being depressed, the shaft communicating with a series of gear-wheels and pinions, by which the necessary speed is obtained, and from which the power is communicated, by a pair of pulleys and a cord or belt connection, to the fiy-wheel.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure l is a plan of a sewing-machine provided with my improved device, the cover or table part of the machine being removed. Fig. 2 is a vertical transverse section on the line 2 2, Fig. l.

A represents a sewing-machine frame'of ordinary construction, in which is journaled one end of the horizontal treadle-shaft B, the other end being supported by a frame, 0, in which (No model.)

Near the forward ends of thelevers E E are pivoted the treadles E F, at f f, which are held down against the beveled ends f f of the levers by springsf"f. V

The rear ends of the levers are connected by wires or rods 9 to springs G G, which act to re-elevate the treadles, the upward motion being limited by chains or cords H, which extend downward from the forward ends of the levers E E and are secured to the frame A.

I represents a gear-wheel secured to the shaft B, and communicating, through multiplying-gearing 1 2 3 4 5, with the shaft J, on the end of which is secured the grooved pulley K, from which a cord, L, communicates the power to the pulley M on the fly-wheel shaft N.

0 represents a shaft similar to the shaft J, to which it is connected by gear-wheels P P, on which shaft 0 the pulley K may be secured in case motion should be required in the opposite direction.

The machine is driven by the operator pressing first on one treadle and then on the other, the springs GG operating to re-elevate the treadles, so as to bring the pawls e e in contact with other ratchet-teeth. Thus by the slow up-and-down motion of the treadle a continuous rotation will be given to the shaft B, which, being transmitted through the gearing I 1 2 3 4 5, will impart the desired speed to the pulleys K M and fly-wheel Q.

It will be seen that as the treadles have a nearly vertical movement, instead of the ordinary rocking motion, the power of the operator can be much more advantageously applied.

My improved motor is adapted for driving various other machines in the same manner as sewing-machines.

Having thus described my invention, the following is what I claim as new and desire to secure by Letters Patent:

1. The combination of the frame A, shaft B, hub D, having ratchet-teeth d (1, levers E E, having pawls e e, treadles F F, springs G G, with suitable multiplying-gearing, substantially as and for the purpose set forth.

2. The combination of the frame A, shaft B,

hub D, having ratchet-teeth d d, levers E E, parts D d E e F G g, with the gearing I 1 2 3 having pawls e e, springs G G, eonneeting- 4 5, and the two shafts J and O geared torods 9 g, pivoted treadles F F, and-ehainsor gether as shown, for the purpose set forth. 1o

cords H, with suitable multiplying-gearing, as FRANZ L. HARTEN STEIN 5 and for the purpose set forth. Witnesses:

3. The combination of the frames A and G, G. W. KLAGES,

shaft B, and treadle mechanism, having the F. A. FALLER. 

